UserInfo readUserInfo3 = metaStore.readUserByProperty(UserConstants2.EMAIL, emailAddress, false, false);
assertNull(readUserInfo3);
// delete the email property and update the user
userInfo.setProperty(UserConstants2.EMAIL, null);
metaStore.updateUser(userInfo);
// read the user
UserInfo readUserInfo6 = metaStore.readUser(userInfo.getUniqueId());
assertNotNull(readUserInfo6);
assertEquals(readUserInfo6.getUniqueId(), userInfo.getUniqueId());